The following are selected 2020 transactions of Culver Ltd. Jan. 1 Purchased a small company and recorded goodwill of 177,000. Its useful life is indefinite. May 1 Purchased for 144,000 a patent with an estimated useful life of 6 years and a legal life of 19 years. Prepare necessary adjusting entries at December 31 to record amortization required by the events above. (If no entry is required, select "No entry for the account titles and enter Ofor the amounts. Credit account titles are automatically indented when amount is entered. Do not indent manually.) Date Account Titles and Explanation Debit Credit Dec. 31 (To record goodwill amortization.) Dec. 31 (To record patent amortization.)